针对步态特征提取系统中采用模拟输出的传感器时,易受外界干扰,需外接RC滤波电路、A/D转换器、外接数据存储器,采集的数据量有限的缺陷,提出了一种基于数字输出的AMI6602动作传感器的步态特征提取系统.实验中,AMI6602输出的加速度数据通过CC1110微处理器进行无线发送和接收.接收到的数据通过串口发送到PC机上进行处理.通过分析人体步态信号中三轴向的加速度波形和俯仰角及倾斜角的变化来提取步态特征.经测试表明:该系统能够清晰地反映人体步态时的特征信号,且抗干扰性强,精确度高,易操作,灵活性强.%Aiming at the defects of easy to be interfered by environment,need extra RC filtering circuit, ADC, external memory, limited data quantity exit in gait feature extraction system when uses sensor whose signals output is analog form. A gait feature extraction system based on digital output is designed. The datas output by AM1602 are transmitted and received by CC1110 microprocessor. The received data is transmitted to computer by serial port and processed. The characteristic are extracted by the analysis of the wave of the acceleration signal of each axis and the change of angle of pitch,angle of inclination. The tests show that this system can reflect the characteristic signal clearly on gait and have a strong capacity to avoid external interference,high precision,easy to operate,good flexibility.
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